I understand WHAT to do, but just not exactly where to start...would you do it on rows 1, 5, 9, 13 (the K rows) and end with a K2tog, or not until rows 4, 8, 12, 16 (P rows) and start with a P2tog. Since it doesn't say THIS and every foll 4th row, I'm kind of inclined toward the second option. It's the left front of the baby bolero, and I'm starting with 18 stitches.